期刊
RSC ADVANCES
卷 12, 期 20, 页码 12702-12709出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra01049f
关键词
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资金
- Innovative Research Team in Science and Technology in Fujian Province University
- Natural Science Foundation of Fujian Province [2019J05121, 2019J01837, 2021J05253]
- Research Project of Ningde Normal University [2019T03, 2020FZ08, 2020T01]
- [21806085]
- [22108129]
In this study, CoCu-ZIF materials with bimetallic structure were synthesized and their properties and structures were effectively controlled by adjusting the molar ratio of cobalt to copper. The as-prepared CoCu-ZIF photocatalysts exhibited excellent photocatalytic performance for denitrification under visible light irradiation, and improved the separation and transfer of photogenerated electron-hole pairs.
Effective design of photocatalysts is an effective method to improve the separation of photogenerated carriers, which improves the photocatalytic performance of photocatalysts. In this work, CoCu-ZIF materials with bimetallic structure were synthesized at room temperature for efficient photocatalytic fuel denitrification. The properties and structures of CoCu-ZIF photocatalysts can be effectively controlled by adjusting the molar ratio of cobalt to copper. The as-prepared CoCu-ZIF photocatalysts were characterized by XRD, FT-IR, SEM, TEM, UV-vis, Raman, BET and other techniques. The photoactivity of CoCu-ZIF for the denitrogenation of NCCs has been evaluated using visible light (lambda >= 420 nm). The results indicate that Co8Cu2-ZIF photocatalysts exhibit excellent photocatalytic properties, in which the denitrification rate almost reached 80% after 4 hours under visible light irradiation, which is higher than the degradation ability of ZIF-67 (38%). Transient photoelectrochemical experiments and EIS Nyquist plots indicate that Co8Cu2-ZIF with unique structure efficiently improves the separation and transfer of photogenerated electron-hole pairs. Moreover, a possible reaction mechanism was proposed by LC-MS analysis.
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